Assigm



(No Model.)

J. R. BACK.

TOOL SUPPORT FOR LATHES.

No. 360,132. v Patented Mar.29, 1887.

WITNESSEEH INV NTUR:

UNTTED STATES PATENT EEIcE.

, JOHL R. BACK, OF \VORCESTER, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO FREDERICK E. REED, OF SAME PLACE.

TOOL-SUPPORT FOR LATH ES.

SPECIFICATION forming part of Letters Patent No. 360,132, dated March 29, 1887.

Appieation filed December-10,1886. Serial X0. 121,228.

To ILZZ 112710721, it may concern:

Be it known that I, Jonn R. Bren, a citizen of the United States, residing at \Vorcester, in the county of \Vorcester and State of Massachusetts, have invented a new and useful Improvement in Tool-Rests for Lathes, of which the following is a specification, accompanied by drawings, in which Figure 1 is a front View of a chucking- 1o lathe with my improved tool-rest applied. Fig. 2 is a sectional view of the lathehed on lineXX, Fig. 3, and showingaside view of the tool-rest. Fig. 3 represents arear view of the tool-rest, and Fig. 4 is a detached view of the sliding latch by which the tool-rest is locked in position.

Similar letters refer to like parts in the several views.

My invention is applicable to any of the difierent forms of machines in which the operation of drilling, boring, chucking, or ream ing is carried on, whether upright or horizontal; but in the accompanying drawings it is shown as applied to an ordinary form of what is known as a chucking-lathe, which is represented in front elevation in Fig. 1, and in which A denotes the bed of the lathe, having the ways A A B is a revolving chuck at tached to the live-spindle of the lathe, and C is a tool-holding turret revolving around a vertical axis, and mounted upon a table, C, having a sliding motion, by which the turret is moved toward or away from the chuck B. The construction and operation of these portions, however, are well known, and therefore require no detailed illustration or description.

Upon the rear side of the lathebed A, I form a way of any suitable form for the purpose required, and consisting in the present instance of the true vertical surface D, Fig. 2, having a T-shaped slot, D. A carriage, E, having a tongue, E, entering the slot D, is arranged to slide along the way D in a line parallel with the ways A A" of the lathe. Bosses 5 a a are formed on the carriage E, through which I pass the bolts b b, having heads cheld in the T-shapcd slots D, and binding-nuts d,

by which the carriage E is clamped upon the way D in any desired position to suit the work 59 to be bored.

(No model.)

The carriage E is provided with lugs E carrying the pintle E", with its axis parallel with the way D and also with the axis of the revolving chuck B. Upon the pint-1e E, I hinge the triangular frame F, having at its apex the socket F, to receive a collar or bushing, (not shown,) held in place by the set-screw e and adapted to fit the tool in use.

The frame F rests at F upon the way A of the lathe, so as to bring the center of the 60 socket F in alignment with the axis of the revolving chuck B. Through the front of the frame F, which extends beyond the edge of the way A, I place a bolt, G, having awashcr,

f, nutsf, and a tighteningnut, G, provided with a handle, G Sliding upon the bolt G, between the washer f and the lower edge of the frame F, is a latelrplate, H, shown in section in Fig. 2 and in a detached view in Fig.

4, and having a bearing on opposite sides of the clamping-bolt G or against the lower side of the frame at g, and also against the under side of the overhanging edge of the way A. The open end of the slot h in the latch H is closed by the plate h, which prevents the entire removal of the latch when it is withdrawn from its engagement with the edge of the way A.

Vhen the tool-rest is not required, the nut G is loosened and the latelrplate H withdrawn, and the frame F turned backward on the pintle E until the shoulderj is brought in con tact with the similar and opposing shoulder,

j, on the. carriage E, thereby li miting the backward swinging motion ofthe frame F and bring- 8 5 ing the horizontal side F into a vertical position, leaving the space between the chuck B and turret C unobstructed.

When the work requires the employment of the too1-rest, the carriage E is moved along the way D in position to bring the frame close to the work held in the chuck B. The binding-nuts d are then tightened and the frame brought into the position shown in Fig. 2, with its front edge resting on the way A ofthe lathe. 5 The latch H is pushed in beneath the overhanging edge of the way A and clamped by tightening the nut G. A-bushing or collar fitting the tool to be used is then placed in the socket F and held by the set-screw c. The op- 10o eration of boring, drilling, chucking, or reaming is then carried on in the usual manner in machines of this class.

In case the work is made to revolve about a vertical axis, as in the different forms of upright drilling or boring machines, the toolrest may be attached to a carriage sliding in ways formed on one of the supporting posts or frame-work of the machine, the essential feature of my invention consisting in the use of acarriage sliding in a line parallel with the axis of the rotating work, and having a toolrest hinged to the carriage, so the tool-supporting socket may be broughtinto alignment with the axis of the rotating work.

I am aware that tool-rests have been heretofore in use by which the tool has been supported in front of the work to be bored. Such I do not claim, broadly; but

What I do claim as my invention, and desire to secure by Letters Patent, is

1. In a machine for boring, chucking, or drilling, the combination, with mechanism for holding the work to be bored, and mechanism for holding and presenting a cutting-tool to the work, and mechanism for rotating said work, substantially as described, of a tool-rest for supporting said cutting-tool between the work and the tool-holding mechanism, said rest consisting of a frame having a socket adapted .to receive and support the cutting-tool, and

hinged to a carriage longitudinally adjustable on the Ways in a line parallel with the axis of' said cutting-tool, and ways formed on the rigid frame-Work of the machine and adapted to receive said carriage, substantially'as described, and for the purpose set forth.

2. Thecombination,with mechanism for boring, chucking, or drilling, substantially as de scribed, of ways formed on the rigid framework of the machine and parallel with the axis of the cutting-tool, a carriage arranged to slide on said ways, a frame hinged to said carriage, having a socket to receive and support the out ting-tool, and a surface formed on the rigid portion of the machine parallel with the way on which said carriage slides, and against which said frame is brought tosecnre a true alignment of the tool-supporting socket witlrthe axis of the cutting-tool, substantially as described.

3. The combination, with mechanism for boring, chucking, or drilling, substantially as described, of ways parallel with the axis of the cutting-tool, a carriage arranged to slide on said ways, clamping devices, substantially as described, for binding the carriage on said ways, a frame hinged to said carriage and having a socket to receive and support the cutting-tool, and a surface formed on the rigid portion of the machine parallel with the axis of the cutting-tool, on which said hinged frame boring, chucking, or drilling, substantially as described, of ways parallel with the axis of the cutting-tool, a carriage longitudinally ad ustable on said ways, a frame hinged to said carriage and having a tool'-supporting socket, a way parallel with the axis of the cutting-tool, on which said hinged frame rests when in use, so as-to bring said socket in true alignment with the axis of the cutting-tool, and a latching device attached to said frame, by which it is held on said frame-supporting way, substantially as described.

5. The combination, with mech anism for boring, chucking, or drilling, substantially as described, of ways parallel with the axis of the cutting-tool, a carriage longitudinally adj ustable on said ways, a frame hinged to said carriage and having a tool-supporting socket, a way parallel with the axis of the cutting-tool and on which said hinged frame rests, and a lip or shoulder formed on said hinged frame in position to be brought against an opposing surface on said carriage and maintain the hinged frame in an upright position when not in use, substantially as described.

6. The combination, with mechanism for boring, chucking, or drilling, substantially as described, of a way on the rigid portion of the machine for supporting a tool support or rest, a tool-supporting carriage resting on said way, and a latching device connected with said toolrest and consisting of a sliding latch-plate arranged to engage the rigid portion of the machine, a bolt passing through a slot in said plate and held in said tool-rest, and a tightening-nut on said bolt, by which said latch-plate is clamped on said tool-rest, substantially as described. I

7. The combination, with mechanism for boring, chucking, or drilling, substantially as described, of a way formed on the rigid por tion of the machine parallel with the axis of the cutting-tool, a T-shaped slot in said way, a carriage sliding on said way and having clamping-bolts entering said T-shaped slot, a triangular frame hinged to said carriage and having a tool-supporting socket, a way formed on the. rigid portion of the machine parallel with the axisof the cutting-tool, on which said triangular frame rests when in use, and a latching device consisting of a sliding latchplate connected with said triangular frame by a bolt having a clamping-nut, substantially as described.

JOHN It. BACK. \Vitnesses:

THOMAS A. VVIOKHAM, SAMUEL H. TAINTER.

IIO 

